Excel: repeat last action

F4 repeats last action in Excel, e.g. Insert row

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Kranzberg’s laws of technology

Melvin Kranzberg’s six laws of technology state:

  1. Technology is neither good nor bad; nor is it neutral.
  2. Invention is the mother of necessity.
  3. Technology comes in packages, big and small.
  4. Although technology might be a prime element in many public issues, nontechnical factors take precedence in technology-policy decisions.
  5. All history is relevant, but the history of technology is the most relevant.
  6. Technology is a very human activity – and so is the history of technology.

From Wikipedia